Home / 20,964.40-28,929.29-11,533.57

Finding the Fourth Proportional to 20,964.40, 28,929.29 and 11,533.57

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Solution

The fourth proportional to 20,964.40, 28,929.29 and 11,533.57 is: 15,915.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.40 : 28,929.29 = 11,533.57 : x
  2. Step 2: Convert to fraction form
    20,964.40/28,929.29 = 11,533.57/x
  3. Step 3: Cross multiply
    20,964.40x = 28,929.29 × 11,533.57
  4. Step 4: Simplify right side
    20,964.40x = 333,657,991.27
  5. Step 5: Solve for x
    x = 333,657,991.27/20,964.40
  6. Step 6: Final answer
    x = 15,915.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.